Major crossings

Tunnels

Stephen Whitham

Spearhead Director, Major Crossings

T: +45 51615202

Richard Miller

Director Ground Engineering & Tunnels

T: +44 7436 269130

Tunnels

Ramboll has the in-house skills to cover the design of all types of tunnels. Our core tunnel skills are providing services for immersed and bored tunnels. As examples, we specialise in the design of immersed tunnels and their construction interfaces, international constructability advice (CA) for major tunnel projects, segmental lining design for bored tunnels, and damage risk assessments for structures in urban areas.

Our specialist skills include tunnelling under and close to existing structures, providing permanent diaphragm walls and using a range of top-down and bottom-up methods.

Our Solutions

Bored tunnels

Constructed in situ, without removing the ground above. They are usually of circular or horseshoe cross-section

Immersed tunnels

Pre-cast concrete or concrete-filled steel tunnel elements fabricated in dry docks and then installed underwater

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Hard rock tunnels

With our home in Scandinavia, we are experienced in all types of hard rock tunneling

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Microtunnels

Technique for creating small diameter tunnels used for the installation of small to medium sized pipes

Soft ground tunnels (SCL)

A wide variety of techniques are available for soft ground tunneling, rangin from Tunnel Boring Machines (TBMs) with segmental linings to Sprayed concrete linings (SCL)

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Cut and cover tunnels

Design techniques have been developed using proven engineering expertise and our wide range of related in-house skills

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Projects & success stories

Learn more about how we have worked with our immersed tunnels services.